Android 日历-周视图

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//获取当天
Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH) + 1; // 注意：月份是从0开始的
int day = calendar.get(Calendar.DAY_OF_MONTH);

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//基姆拉尔森计算公式根据日期判断星期几
public  String CalculateWeekDay(int y, int m, int d) {
    if(m < 1 || m >12){
        System.out.println("你输入的月份不再范围内，请重新输入！");
    }
    if (m == 1 || m == 2) {
        m += 12;
        y--;
    }
    String week = null;
    int iWeek = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7;
    switch (iWeek) {
        case 0:
            week = "星期一";
            break;
        case 1:
            week = "星期二";
            break;
        case 2:
            week = "星期三";
            break;
        case 3:
            week = "星期四";
            break;
        case 4:
            week = "星期五";
            break;
        case 5:
            week = "星期六";
            break;
        case 6:
            week = "星期日";
            break;
        default:
           break;
    }

    return week;
}

//  获取未来一星期内的日期集合

public static List<String> getNextSevenDays() {
    List<String> nextSevenDays = new ArrayList<>();
    Calendar calendar = Calendar.getInstance();

    SimpleDateFormat dateFormat = new SimpleDateFormat("MM.dd");

    for (int i = 0; i < 6; i++) {
        nextSevenDays.add(dateFormat.format(calendar.getTime()));
        calendar.add(Calendar.DATE, 1); // 增加一天
    }

    return nextSevenDays;
}